Fullerton, California Weather:
Thursday, June 4, 2026
Cloudy Weather
Day 79°
Night 64°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 11
Weather Forecast History
Last Year's Weather on This Day (June 4, 2025)
Cloudy Weather

Day

73°

Night

59°

Wind

7 mph

UV Index

11

Precipitation

3 %